Aww! Jessica Simpson's little girl is growing up so quickly! The "Fashion Star" mentor, who is currently pregnant with her second child, couldn't resist sharing an adorable snapshot of her daughter Maxwell Drew on Twitter on Friday, Feb. 1.

"My lil dollface is 9 months today!" Simpson captioned the shot. In the photo, the singer's precious firstborn, clad in a tiny navy, red and white-striped sweater and snug jeans, looks awestruck as she balances precariously inside a sink.

Maxwell (whose papa is Simpson's fiance Eric Johnson) even shows off a full head of blonde hair, just like her mom.

Simpson, 32, initially confirmed her second pregnancy on Christmas Day, with a shot of Maxwell sitting on a beach with the words "Big Sis" written in front of her in the sand. Us Weekly revealed the news just one month earlier, on Nov. 28.

"Merry Christmas from my family to yours!" she captioned the shot. Simpson's second pregnancy "definitely wasn't planned," a friend told Us at the time, though she "loves being a mom and "is overjoyed."

And Maxwell's younger brother or sister couldn't be born into a more caring family, Simpson's younger sister Ashlee Simpson revealed to Us recently.